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ESE 2021 Technical Quiz 5

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Question 1

A 12-pole, 440 V, 50 Hz, 3-phase synchronous motor takes a line current of 100 A at 0.8 pf leading. Neglecting losses, the torque developed will be

Question 2

Which one of the following pulse communications systems is digital?

Question 3

If a distance relay fails to operate for a fault which is within its zone then the condition is called

Question 4

Decade counter is also known as

Question 5

Which of the following statements are true for current sources inverter (CSI)?

1) It requires feedback diodes.

2) IGBT is generally not preferred in CSI.

3) The amplitude of output current is independent of load.

Question 6

A 500 MVA 66 kV/132 kV transformer star-delta has per unit leakage reactance of 0.1 pu on the base of 500 MVA, primary voltage 66 kv. What is the leakage reactance referred to secondary side in ohms is:

Question 7

Why is a centrifugal switch used in a single-phase induction motor?

Question 8

A particular circuit has four resistances 100 Ω, 50 Ω, 25 Ω and X Ω connected in parallel. Current through 25 Ω resistance is 4 A. If the total current is 15 A, what is the current through the resistance X Ω?

Question 9

Addition of open-loop poles results into which of the following?

Question 10

A relay is connected to a 400/5 current transformer and set for 120 %. The primary fault current is 1800 A need a plug setting multiplier of

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ESE & GATE EE General

Mar 4ESE & GATE EE